总线裁决方式
参考答案：
决定总线由哪个设备进行控制的方式。
— Tim plays computer games too much.
— That's why his mother __________ his eyesight.[ ]
A. is happy with
B. is interested in
C. is proud of
D. is worried about
织物的经纱（或纬纱）密度
